Results 131 to 140 of about 19,731 (212)

基于专利分析的电网雷电防护技术发展研究

Gaoya dianqi, 2019
基于全球电网雷电防护技术专利数据,揭示全球电网雷电防护技术的发展现状和趋势。利用专利情报分析方法,分析专利申请态势、技术生命周期、专利技术分布、专利区域布局和技术最新动向。研究结果表明,电网雷电防护技术已发展成熟,专利申请呈稳中有降趋势;专利技术主要集中于对过电压响应的紧急保护电路装置、避雷导线的安装、架空线路或电缆的安装/维护/修理/拆除的方法或设备、提供外部电弧放电路径的装置、过电压保护电阻器/避雷器等领域;专利布局区域主要为中国、日本、俄罗斯、韩国和美国,各区域内专利保护的技术各有侧重 ...
邓阿妹, 魏凤, 牟乾辉, 谷山强, 赵淳, 曾瑜, 陈路, 陈诚, 陈秀敏   +8 more
doaj  

Dual Fluorescence from Aqueous 1-Naphthylamine Solutions of High pH ——Excited-State Acidic Dissociation of Naphthylamine

, 2001
Dual fluorescence at ca. 447 nm and 545 nm w as observed from the aqueous 12naph thylam ine (NA ) solutions at pH h igher than 1316. Sim ilar dual fluorescence was also found w ith sodium12naph thylam inoacetate (NAA ) , but not w ith N , N ...
孙向英, 江云宝, 温珍昌, 马丽花   +3 more
core   +1 more source

[Perioperative infection prevention strategies for double-lung transplantation in elderly patients with COVID-19]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban, 2020
Ma Y, Meng H, Wang Y, Sun X, Chen Z.
europepmc   +1 more source

低压配电系统电涌保护器保护模式研究

Dianci bileiqi, 2017
为了有效利用电涌保护器对低压配电系统进行雷电过电压防护,需要对电涌保护器保护模式进行研究。利用EMTP软件搭建1.2/50-8/20μs组合波和0.5μs-100k Hz标准振荡波发生电路,同时采用IEEE氧化锌压敏电阻模型进行仿真冲击。分析TN-C-S配电系统中不同电涌保护器保护模式的防护效果。最后讨论电涌保护器接地电阻阻值对线间电位差影响。仿真结果表明:仅在L线与N线或L线与PE线间安装SPD,不能够有效保护负载设备;在L线与N线、N线与PE线间安装SPD或三线间均安装SPD时,防护效果较好 ...
杨泽江
doaj  

基于全球专利的中国电网防雷技术竞争力分析 [PDF]

, 2019
邓阿妹, 魏凤
core  

[Effects of Ionizing Radiation on Intestinal Bile Acid Metabolism: Mechanism of the Radioprotective Effect of Glycoursodeoxycholic Acid]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Dai J, Gao Y, Wang J, Zhang S, Liu P.
europepmc   +1 more source

[Clinical characteristics of pediatric patients with acute lymphoblastic leukemia admitted to the pediatric intensive care unit]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Wu FF, Mao JY, Wan WQ, Wen C.
europepmc   +1 more source

[Expert consensus on monoclonal antibody immunoprophylaxis against respiratory syncytial virus in infants and young children in tropical and subtropical regions of China]. [PDF]

Zhongguo Dang Dai Er Ke Za Zhi
Subspecialty Group of Neonatology, Society of Pediatrics, Chinese Medical Association, Guangdong Medical Association, Editorial Board of Chinese Journal of Contemporary Pediatrics.   +4 more
europepmc   +1 more source

[Construction of the evaluation index system for nursing quality management in outpatient dental clinics based on the structure-process-outcome model]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Wei J, Liu F, Yang C, Wang J, Ma Y, Yang J, Xie J, Xu L.   +7 more
europepmc   +1 more source

[Analysis of Responsibilities and Coordination Among Key Stakeholders in Chronic Disease Prevention and Control in China Based on the Innovative Care for Chronic Conditions Framework]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Jiang H, Zhang T, Yang Y, Zhou C, Pan J, Wang X.   +5 more
europepmc   +1 more source